nin4

Mouseover to view DCS 4 enhancement of ninhydrin print

TECHNOLOGY FOR THE DETECTION, CAPTURE & ENHANCEMENT OF FINGERPRINTS

 

Ninhydrin

 

Used to develop fingerprints since the 1950's, Ninhydrin (2,2-Dihydroxyindane-1,3-dione) is a chemical reagent that reacts with the amino acid within latent fingerprints to develope friction ridge detail.


Ideal for the development of fingerprints on porous surfaces such as paper, wood and plaster, the reaction between ninhydrin and amino acids creates a compound known as Ruhemann's Purple leaving fingerprints highly visible on many backgrounds.

In cases where the visibility of the Ruhemann's Purple compound is weak, a sequential treatment with zinc chloride may be applied to the print. 

While the application of zinc chloride does not increase ridge detail it does provide fluorescence, allowing the examiner to visualise the print using a green Crime-lite and appropriate viewing goggles.

Fingerprint clarity can be further enhanced using the DCS-4's dedicated ninhydrin enhancement toolbox.

THERMAL DEVELOPMENT OF FINGERPRINTS IS ACHIEVED WITH THE FOLLOWING PRODUCTS

DCS 4 The complete fingerprint workstation

Crime-lite Imager A semi-automated fingerprint capture and enhancement system

Crime-lite 82S forensic light sources